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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head> <meta http-equiv="Content-Type" content="text/html; charset=windows-1251"> <meta name="keywords" http-equiv="keywords" content="Коллоидные квантовые точки, квантовые точки, полупроводниковые нанокристаллы, квантовое ограничение, тетраподы, нанотетраподы, наногетероструктуры, нанокристаллы типа II, тип II, солнечные батареи, нуклеация, рост, люминесцентные материалы, CdTe, CdSe, CdTe/CdSe, CdTe/CdS, CdSe/CdS, биометки, OLED, QLED"><title>Лаборатория химии и физики полупроводниковых и сенсорных материалов </title> <link href="lab.css?140414" rel="stylesheet" type="text/css"> </head> <body> <table border="0" cellpadding="0" cellspacing="0" height="100%" width="100%"> <tbody> <tr> <td valign="top" width="*"> <table border="0" cellpadding="0" cellspacing="0" height="100%" width="100%"> <tbody> <tr> <td class="Header" height="155"> </td> </tr> <tr> <td> </td> </tr> <tr> <td class="Header" height="30"> </td> </tr> </tbody> </table> </td> <td width="980"> <table style="width: 980px; height: 100%;" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td class="Header" height="25" width="200"> </td> <td class="Header" align="center" height="25" width="570"> <p id="lab">ЛАБОРАТОРИЯ ХИМИИ И ФИЗИКИ ПОЛУПРОВОДНИКОВЫХ И СЕНСОРНЫХ МАТЕРИАЛОВ</p> </td> <td class="Header" height="25" width="140"> </td> <td class="Header" height="25" width="20"><a href="index.html" class="labLNK"><img src="images/home.jpg" alt="главная" title="главная" border="0" height="16" width="16"></a></td> <td class="Header" height="25" width="25"><a href="en/pDirin.html" class="labLNK"><img src="images/flag-en.jpg" alt="english" title="english" border="0" height="15" width="20"></a></td> <td class="Header" height="25" width="25"><a href="pDirin.html" class="labLNK"><img src="images/flag-ru.jpg" alt="русский" title="русский" border="0" height="15" width="20"></a></td> </tr> <tr> <td colspan="6" class="Header" height="130"> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" align="top" height="130" width="980"> <param name="allowScriptAccess" value="sameDomain"> <param name="movie" value="lab_menu.swf?140414"> <param name="quality" value="high"> <param name="bgcolor" value="#4f6f9c"> <embed src="lab_menu.swf?140414" quality="high" bgcolor="#4f6f9c" allowscriptaccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" align="top" height="130" width="980"> </object> </td> </tr> <tr> <td><br> </td> <td colspan="5" class="BodyTxt"> <p class="Default" style="text-align: justify;"><b style=""> Исследование гетерограниц магнитных металлов и топологических диэлектриков: энергетический спектр, атомная структура, химическое взаимодействие</b>.</p> <p style="text-align: justify;" class="MsoNormal"><span style=""> Топологический</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">изолятор</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">отличается</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">от</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">традиционного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">диэлектрика</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">количеством</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пересечений</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">уровня</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Ферми</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">его</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхностными</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состояниями</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">между</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">значениями</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">импульса</span><span style="font-family: "Tahoma","sans-serif";"> k1 </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> k2, </span><span style="">где</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точки</span><span style="font-family: "Tahoma","sans-serif";"> k1 </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> k2 </span><span style="">инвариантны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">по</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">отношению</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">к</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обращению</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">времени</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">т</span><span style="font-family: "Tahoma","sans-serif";">.</span><span style="">е</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">являются</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точками</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">симметрии</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обратном</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пространстве</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Когда</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхностное</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состояние</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пересекает</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">уровень</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Ферми</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">нечётное</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">число</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">раз</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">между</span><span style="font-family: "Tahoma","sans-serif";"> k1 </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> k2, </span><span style="">оно</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">соединяет</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">валентную</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зону</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зону</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">проводимости</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">это</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пересечение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">не</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">может</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">быть</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">убрано</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Причина</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">этого</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">заключается</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">том</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">что</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">время</span><span style="font-family: "Tahoma","sans-serif";">-</span><span style="">обратная</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">симметрия</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">заставляет</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состояния</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пересекаться</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">каждой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">инвариантной</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точке</span><span style="font-family: "Tahoma","sans-serif";">.<o:p></o:p></span></p> <p style="text-align: justify;" class="MsoNormal"><span style=""> С</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">другой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">стороны</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">время</span><span style="font-family: "Tahoma","sans-serif";">-</span><span style="">обратная</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">симметрия</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">может</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">быть</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">нарушена</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнитным</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">полем</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">что</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">приводит</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">к</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">снятию</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">вырождения</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Крамерса</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">формированию</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">запрещённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зоны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологическом</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхностном</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состоянии</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точке</span><span style="font-family: "Tahoma","sans-serif";"> k = 0. </span><span style="">Этот</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффект</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">был</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">продемонстрирован</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">работе</span><span style="font-family: "Tahoma","sans-serif";"> [Kon07] </span><span style="">путем</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">воздействия</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнитного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поля</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">напряженностью</span><span style="font-family: "Tahoma","sans-serif";"> 28 </span><span style="">мТ</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">двумерную</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">систему</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">квантовых</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">спинов</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Холла</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">реализованных</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> HgTe (</span><span style="">система</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">с</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологически</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">защищёнными</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">одномерными</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">граничными</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состояниями</span><span style="font-family: "Tahoma","sans-serif";">). </span><span style="">Для</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">трёхмерного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологического</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">изолятора</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">приложение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">локального</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обменного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поля</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">исходящего</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">от</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">адсорбированного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">его</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхности</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">ферромагнитного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">материала</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">оказывается</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">намного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">более</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффективным</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">чем</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">приложение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">внешнего</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поля</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Для</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологического</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">изолятора</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхности</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">которого</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">присутствуют</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнитно</span><span style="font-family: "Tahoma","sans-serif";">-</span><span style="">упорядоченные</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхностные</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">примеси</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">предсказано</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">множество</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">новых</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">электронных</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">спиновых</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффектов</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">частности</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">квантованный</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологический</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнетоэлектрический</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффект</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">приводящий</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">к</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">полуцелым</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зарядам</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">границах</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнитных</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">доменов</span><span style="font-family: "Tahoma","sans-serif";"> [Qi08], </span><span style="">увеличение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнетосопротивления</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">при</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">параллельной</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">намагниченности</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">доменов</span><span style="font-family: "Tahoma","sans-serif";"> [Yok10] </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обратный</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">спин</span><span style="font-family: "Tahoma","sans-serif";">-</span><span style="">гальванический</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффект</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">обеспечивающий</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">возможность</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">бездиссипативного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обращения</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">намагниченности</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">при</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">действии</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">электрического</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">тока</span><span style="font-family: "Tahoma","sans-serif";"> [Gar10]. </span><span style="">В</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">литературе</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">применялось</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">субмонослойное</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">покрытие</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">железом</span><span style="font-family: "Tahoma","sans-serif";"> (0.2 </span><span style="">монослоя</span><span style="font-family: "Tahoma","sans-serif";">) </span><span style="">для</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">создания</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> Bi2Se3 </span><span style="">запрещённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зоны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точке</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Дирака</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">по</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">схеме</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">приведённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">рис</span><span style="font-family: "Tahoma","sans-serif";">. 2 [Wra10]. </span><span style="">Нами</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">недавно</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">было</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">показано</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">что</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">при</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">покрытиях</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">вплоть</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">до</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">монослойного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">диапазона</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">образования</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">запрещённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зоны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точке</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Дирака</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">не</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">происходит</span><span style="font-family: "Tahoma","sans-serif";"> [Sch12].<o:p></o:p></span></p> <p class="MsoNormal"><span style=""> Напыление</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">слоёв</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">железа</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">верхнем</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">субмонослойном</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">диапазоне</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">не</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">приводит</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">к</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">образованию</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">запрещённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зоны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">порядка</span><span style="font-family: "Tahoma","sans-serif";"> 100 </span><span style="">мэВ</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">как</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">предполагалось</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">ранее</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Дополнительно</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">показано</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">что</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">при</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">комнатной</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">и</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">пониженной</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">температуре</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">происходит</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">противоположное</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">легирование</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Это</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">показывает</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">что</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">двух</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">рассмотренных</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">случаях</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">атомы</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">железа</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">имеют</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">различное</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">химическое</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">окружение</span><span style="font-family: "Tahoma","sans-serif";">.<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-family: "Tahoma","sans-serif";"><o:p> </o:p></span></p> <p class="MsoNormal" style=""><span style=""><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype><v:shape id="Picture_x0020_206" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:415.2pt;height:132.6pt;visibility:visible;mso-wrap-style:square'> <v:imagedata src="file:///C:\Users\Alexey\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png" o:title="" cropleft="3606f"/> </v:shape><![endif]--><!--[if !vml]--><img style="width: 554px; height: 177px;" alt="fig3_1.png" src="images%5Cfig3_1.png" v:shapes="Picture_x0020_206"><!--[endif]--></span><span style=""><o:p></o:p></span></p> <p class="MsoNormal" style=""><i><span style="" lang="EN-US">Behavior of the TSS upon Fe deposition. ARPES data for clean surface (a) and with increasing Fe coverage (b-d)</span></i><span style="" lang="EN-US"><o:p></o:p></span></p> <p class="MsoNormal" style=""><span style=""> Огромный</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">интерес в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">настоящее</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">время представляют магнитные</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">примеси</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">матрице</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологического</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">изолятора</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">Несмотря</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">нарушение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">симметрии</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">относительно</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">обращения</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">времени</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">топологические</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">свойства</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">остаются</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">практически</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">теми</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">же</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">самыми</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">а</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">дополнительный</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">магнитный</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">момент</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">приводит</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">к</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">новым</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">интересным</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффектам</span><span style="font-family: "Tahoma","sans-serif";">. </span><span style="">В</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">частности</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">были</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">предсказаны</span><span style="font-family: "Tahoma","sans-serif";">: </span><span style="">образование</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">запрещённой</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зоны</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">точке</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Дирака</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">топологического</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхностного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">состояния</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зависимости</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">от</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">вектора</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">намагниченности</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">перпендикулярного</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">поверхности</span><span style="font-family: "Tahoma","sans-serif";">; </span><span style="">изменение</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зонной</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">структуры</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">типа</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффекта</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Рашбы</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">в</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">направлении</span><span style="font-family: "Tahoma","sans-serif";"> k||; </span><span style="">гибридизованная</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зонная</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">структура</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">расщепления</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">ферромагнитных</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">зон</span><span style="font-family: "Tahoma","sans-serif";">, </span><span style="">свидетельствующая</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">об</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">аномальном</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">квантовом</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффекте</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">Холла</span><span style="font-family: "Tahoma","sans-serif";"> [Yu10]. </span><span style="">Эти</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">эффекты</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">активно изучаются </span><span style="font-family: "Tahoma","sans-serif";"><span style=""> </span></span><span style="">УФЭС</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">УР</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">на</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">синхротронном</span><span style="font-family: "Tahoma","sans-serif";"> </span><span style="">излучении</span><span style="font-family: "Tahoma","sans-serif";">.<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">[Kul02] V. A. Kulbachinskii, A. Yu. Kaminskii, K. Kindo, Y. Narumi, K. Suga, P. Lostak, and P. Svanda, Ferromagnetism in new diluted magnetic semiconductor Bi2?xFexTe3, Physica B 311, 292 (2002)<o:p><br> </o:p>[Kon07] M. Konig, S. Wiedmann, Ch. Br?ne, A. Roth, H. Buhmann, L. W. Molenkamp, X.-L. Qi, S.-C. Zhang, Quantum spin Hall insulator state in HgTe quantum wells, Science 318, 766 (2007)<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">[Qi08] X. L. Qi, T. L. Hughes, S. C. Zhang, Fractional charge and quantized current in the quantum spin Hall state, Nature Phys. 4, 273 (2008).<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US"><span style=""> </span>[Gar10] I. Garate, M. Franz, Inverse Spin-Galvanic Effect in the Interface between a Topological Insulator and a Ferromagnet Phys. Rev. Lett. 104, 146802 (2010)<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">[Wra10] L. A. Wray, S. Y. Xu, Y. Xia, D. Hsieh, A. V. Fedorov, Y. San Hor, R. J. Cava, A. Bansil, <o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">H. Lin, M. Z. Hasan, A topological insulator surface under strong Coulomb, magnetic and disorder perturbations, Nature Phys. 7, 32 (2010)<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">[Yok10] T. Yokoyama, Y. Tanaka, N. Nagaosa, Anomalous magnetoresistance of a two-dimensional ferromagnet/ferromagnet junction on the surface of a topological insulator, Phys. Rev. B 81, 121401 (2010)<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US">[Yu10] Rui Yu, Wei Zhang, H. J. Zhang, S. C. Zhang, Xi Dai, Zhong Fang, Quantized Anomalous Hall Effect in Magnetic Topological Insulators, Science 329, 61 (2010)<o:p></o:p></span></p> <p class="MsoNormal" style=""><span style="font-size: 10pt;" lang="EN-US"><span style=""> </span>[Sch12] M. R. Scholz, J. S?nchez-Barriga, D. Marchenko, A.Varykhalov, A. Volykhov, L. V. Yashina, and O. Rader, Tolerance of topological surface states towards magnetic moments: Fe on Bi2Se3, Phys. Rev. Lett. (in press, LM12975), see also arXiv:1108.1037 (2011)<o:p></o:p></span></p> </td> </tr> <tr> <td class="Header" height="30"> <p class="webmaster">web-design: <a href="mailto:ddirin@rambler.ru" class="webmaster">ddirin@rambler.ru</a></p> </td> <td colspan="5" class="Header" height="30"> <p class="Contact">© 2008-2014 Лаборатория химии и физики полупроводниковых и сенсорных материалов.</p> </td> </tr> </tbody> </table> </td> <td valign="top" width="*"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr> <td class="Header" height="155"> </td> </tr> <tr> <td> </td> </tr> <tr> <td> </td> </tr> </tbody> </table> </td> </tr> </tbody> </table> <hr class="line1"> <hr class="line2"> <div class="divheader"></div> </body></html>
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